/*
 * Copyright 2010 Chad Retz
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package org.jdocng.parse.qdox.function;

import org.jdocng.parse.qdox.QDoxContext;
import org.jdocng.parse.qdox.QDoxUtils;
import org.jdocng.shared.model.SeeTagImpl;

import com.thoughtworks.qdox.model.AbstractJavaEntity;
import com.thoughtworks.qdox.model.DocletTag;
import com.thoughtworks.qdox.model.JavaPackage;

/**
 * Construct {@link SeeTagImpl} from {@link DocletTag}
 *
 * @author Chad Retz
 */
public class SeeTagFunction extends TagFunction<SeeTagImpl> {

    private static final SeeTagFunction instance = new SeeTagFunction();
    
    public static SeeTagFunction getInstance() {
        return instance;
    }
    
    protected SeeTagFunction() {
    }
    
    @Override
    public SeeTagImpl apply(QDoxContext context, DocletTag from) {
        SeeTagImpl to = new SeeTagImpl();
        apply(context, from, to);
        return to;
    }
    
    @Override
    public void apply(QDoxContext context, DocletTag from, SeeTagImpl to) {
        super.apply(context, from, to);
        to.setKind("@see");
        String firstWord = TagFunction.getFirstWord(from.getValue());
        //TODO check cast here!
        JavaPackage pkg = QDoxUtils.getReferencingPackage(
                firstWord, context.getBuilder());
        AbstractJavaEntity entity = null;
        if (pkg == null) {
            entity = QDoxUtils.getReferencingMember(firstWord, 
                    context.getBuilder(), (AbstractJavaEntity) from.getContext());
        }
        if (pkg != null || entity != null) {
            to.setLabel(from.getValue().substring(firstWord.length()).trim());
            if (pkg != null) {
                to.setReferencedPackage(pkg.getName());
            } else {
                to.setReferencedClass(entity.getParentClass().getFullyQualifiedName());
                to.setReferencedMember(entity.getName());
            }
        } else {
            to.setLabel(from.getValue());
        }
    }

}
